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1. Consider treating polyenes, ethylene, butadiene, hexatriene, etc., with the one-dimensional particle-in-the-box model. What length polyene (i.e., number of C atoms) is required to absorb light in the red region of the spectrum? How does that compare with the conjugated portion of carotene? 2. Again using the particle-in-the-box problem, predict in eV the first IP and electron affinity of hexatriene. What temperature would be needed to achieve 10% population of the normally lowest unoccupied molecular orbital (LUMO)? 3. Consider an electron in one, two, and three dimensional boxes with a side of 4 A. How does the zero-point energy vary with increasing dimension?
Consider an area-source box model for air pollution above a peninsula of land. the length of the box is 15 km, its width is 80 km, and a radiation inversion restricts mixing to 15 m.
The type of enzyme regulation where a regulatory molecule binds to the enzyme and changes the shape of the active site is called
A 25.688 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia.
A mixture of twenty five grams of potassium nitrate(KNO3) and two grams of CuSO4*5H20 with 11.5 grams of water at 100 degree celcius temperature, 15 g ramsof water are mixed.
The rate of an enzyme-catalyzed reaction usually increases with temperature, but then decreases after reaching the "optimal temperature."
On a sheet of paper draw the molecule that fits the given description. From the structure you drew determine the correct IUPAC name.
Describe in 75 words the structure of the carbon atom. What types of bonds does carbon form and why?
Make a graph of density (y) vs. concetration in mass% (x). Record the slope of y-intercept of the line
determine the expression for the rate of the reation in terms of the change in concetration of each of the reatants and products.
Indole is a competitive inhibitor of chymotrypsin. In the absence of the inhibitor, chymotrypsin will very slowly hydrolyze glycine residues in proteins, but will hydrolyze aromatic amino acids. In the presence of indole
The combined flow to the two tanks is .1 m^3/s. the depth of each tank is 2 m and each has a detention time of 4 h. what is the surface area of each tank and what is the overflow rate of each tank in m^3/d*m^2?
What is the molarity of hydrogen ion in the above sulfuric acid solution if you assume the sulfuric acid ionizes completely? the above sulfuric acid solution is 0.07 M.
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